Gas burner



Ma'y 1s, 1945. B PRATT I 2,376,273

GAS BURNER Filed Dec. 18, 1959 v4 SheetS-She-et 2 Bossi?V PralL.

SH/tommy Maly15,1945.l B; PRATT 7 2,376,273

\ 1` i GAS .BURNER l Filed Dec. 18, 1959 4 Sheets-Sheet 5 Basi Prda;

Patented May 15, 1945 GAS BURNER Best Pratt, Chicago, Ill., assignor to Certified Gas Equipment Company, Chicago, Ill., a corporation of Illinois Application neeember 1s, 1939, serien Ne. 309,869

claims. 01. 15s- 194) I,

The present invention relates to gas range burners.

`The principal objects of the invention are to provide burner devices for use with a gas range and which devices are economical in manufac` ture, capable of ready assembly, and provide a highly efl'lci'ent flame with economical gas consumption.

Other objects and advantagesof the invention will be apparent from the following specication and attached drawings wherein Figure 1 isa view oi a burner of the present invention, the view showing the burner in diametrical front to rear vertical section and mounted on a mixing tube.

Figure 2' is a top plan View of a burner base plate.

Figure 3 is a' bottom plan view of a base plate.

Figure 4 is a side elevation of the base plate of Figures 2 and 3. i

Figure' 5 is a developed view of a base plate f taken on the line 5-5 of Figure 2.

. Figure 6 is a`bottom'view of the burner body of Figure 1.

Figure 7 is a `radial section of a burner body and base plate taken on a line corresponding to the line 1-1 of Figure 2.

Figure 8 is a view showing a burner device of Figure 12 is a top plan view of a modiiied form of base plate.

Figure 13 is e bottom pien view of the'bese plate of Figure 12.

Figure 11 is a bottom view of the burner of Figure 8.

Figure 15 is a side elevation of the base plate oi Figure 12. y

Figure 16 Vis a bottom planwiew of a modified -form of burner device.

Figure 17 is a vertical sectional view on the line l1-I1 of Figure 16.

Figure 18 is a developed sectional view on the Figure 19 isa bottom plan view of a modied form of burner device,

Figure 20 is "a vertical sectional View on the line 20e-'20 of Figure 19 and l Figure 21 is a developed sectional view on th line 2 |2| of Figure 19. y

, Figures 1 to '7 illustrate a main burner I0 of average capacity assembled upon a mixing tube I5 With a simmer burner I8, while Figures 8 to 15 illustrate a main burner I1 of large capacity assembled upon a mixing tube i5 with a simmer burner IB.

Referring to Figure 1,'it will be noted` that the burner I9 includes a base plate |10 and a burner body 200. The base plate |10 is of annular form as shown by the Figure 2 top plan View thereof. A hollow inlet boss projects downwardly from one side of base plate |10. and has an inlet 202 formed therein which is of the same outline as the outlet |62 of the mixing tube t0 which it is tted. The mixing tube may be of the type disclosed in my divisional application, Serial No. 541,162, led June 20, 194e,` for Gas range structures, which is a division of the present application. As best shown in Figure 5, which is a development of the base plate |10 taken on the line 5-5 of Figure 2, the inlet portion of the boss is in the form of a short Vertical sleeve which opens into portions diverging circumferentially of the base plate,

with the lower walls 205 of the diverging portions like projection 20| which' seats'upon a mixing tube with its inlet 202 in alignment with the outlet |62 of the mixing tube. Threaded sockets 206 in the boss-like projection 20| will then be in alignment with the apertures in the mixing tube.

The burner body 200 is also of annular form to denne a central aperture |9a. The inner wall 208 is outwardly inclined but substantially straight to a point substantially midway of the height of the burner body and thence curves outwardly as indicated at 209 to join the outer wall of the burner body. The outer wall is curved inwardly as indicated at 2|0 and thence extends upwardly. slightly inclined inwardly tothe vertical, as indie cated at 2| In other words, the outer Wall of the burner body, in radial section, comprises a rounded abutment surmounted by a substantially straight and inwardly inclined face 2|2. The angle of inclination of face 2|2 from the vertical is approximately eleven and one-half degrees.

Jet apertures 2I3 are provided in the face 2I2 on lines at right angles to the face 2I2 so that their axes will be slightly inclined upwardly and outwardly. The provision of the lower rounded portion 2li) in the outer wall of the burner body provides` a projection beneath the jet apertures which causes secondary air to flow upwardly and inwardly toward-the mouths of the burner .let ports, giving a more efficient flame. Also, the provision of this outwardly curved wall provides a widened gas passage within the burner beneath the line of the jet ports so that an unrestricted flow of gas will be provided within the circular burner body. The provision of the deep inlet boss with inclined lower walls also gives improved gas and primary air distribution l The burner body 200 and base plate Il are joined by screws passing through apertured and suitably threaded ears Zla and llda as best shown in Figure 7.

The burner device of Figures 1 to 7 may be described as of average size.

The simmer burner I8 illustrated in Figure 1 is similar to that shown in Figure 8 and is described in connection with the latter figure.

Figure 8 illustrates a large capacity burner Il czzomprising a burner body 235 and a base plate The burner base plate 236 illustrated in Figures 8 to 15 is identical in construction with that illustrated and described in connection with Figures 1 to 'l except that it is of larger diameter, being designed to support the burner body 235 of larger capacity. Also, the lower wall Zilda of the diverging inlet'portion of the ba'se plate 236 is uncurved as shown in Figure 11.

'I'he burner body 235 is somewhat wider in radial section than the burner body 280 and its inner wall 23T is rounded outwardly from a point adjacent its lower edge, the top portion of the inner wall in effect forming the top wall 233 of the burner body. The outer wall of the burner body includes a substantially vertical slightly inwardly inclined lower Imrtion 242 which terminates at a rounded shoulder or ledge 243 which is inclined very slightly upwardly. Above ledge 243 a vertical `face 244 is provided having its upper portion rounded to join the top wall 238. The upper vertical wall 244 is inclined inwardly at an angle on approximately eleven and one-half degrees vandliiigure 8 burners the burner jet ports are protected from spilled or overowing food' due to the ,fact that they are positioned immediately above downwardly inclined shoulders. In other words, any substance spilling upon the burner -will ilow downwardly off the shoulders rather than into the jet ports. Also, the provision of the -rounded inner walls insures that food dropping -upon the same will .ilow downwardly. Since the simmerburner jets 2I8 are spaced inwardly from the inner walls of the main burners, as hereinafter described, these latter jets will not be affected by dropping of any substance upon the burners.

The jet ports 2 I3 and 245 of the'respective main burners are closely spaced entirely around the Aburners and are of relatively small diameter-so that a continuous ring of flame will be directed upwardly..

Each simmer burner I8 includes a sleeve portion 2 I 5 which is adapted to extend down through the simmer burner chamber |66 with its lower portion beneath the low'er wall of the chamber to receive a nut 2I6. The position of the sleeve 2I5 vertl- The bight of the flange 2I'l `is provided with jet apertures 2I8 inclined very slightly inwardly from the vertical, preferably at an angle of approximately twenty degrees.

It will be noted that while the extreme upper surface of the simmer burner I8 is substantially flush with the lower surface of the main burner base plate, a space is provided between the inner edge I'II of the base plate wall and the opposed curved surface of the simmer burner. This will permit an entirely adequate supply of secondary air to reach the simmer burner, while the fact that the simmer burner llame will be within and above the lower portion of the main burner will prevent such flame from being extinguished by drafts.

The downwardly projecting portion 2I9 of the burner flange is provided with a, jetted nipple 220'so positioned as to face the pilot burner combustion tube 25' associated with that burner. Hence, when gas is supplied to the simmer burner, some gas will flow through the nipple 220 into the combustion tube and will there be ignited to cause a llame to flow from that tube to ignite the gas issuing from the jet ports 2I8 of the simmer burner. In order that the main burner may be ignited from the simmer burner, the base plates Il@ and 236 are radially slotted as indicated at 22! at a point preferably diametrically opposite the inlets 202 and 2|J2a of the main burner, as best shown in Figures 2 and 12. Hence, when the main burner is supplied with gas, gas will issue from the slot 22I toward the simmer burner to be ignited and a iiame will then move up along and in a lateral recess on the outer surface of the main burner formed bya recess 222 in the base plate adjacent the outer end of the slot 22| and a recess formed in the outer wall of the body of the main burner. The inner shoulder of the base plate recess is rounded as shown in Figure l to permit the gas to readily move upwardly around the same.

In the Figure l burner body 200, the igniting recess 22211. has straight or Vertical side walls 223 and an inner wall 225 which is a continuation of the upper wall 2 I2. Thus, in the Figurel burner body 200 the igniting recess extends sub stantially directly upwardly to the jet ports 2I3. In the Figure 8 burner body 235, the recess 222D has radial side walls/ 228 and an outwardly inclined top wall 229 which opens to the oute'r wall 242 of the burner body at a point below the ledge 243. In other words, therecess is outwardly and upwardly facing. Both base plates I'Ill and 236 are provided with shoulders 230 on their bottom faces arranged at an angle to the slots 22I to prevent the plates from spreading at the slots before they are 'applied to the burner body.

Figures. 16 .to 21 show one piece burner devices, that is, burner devices wherein the base plate and burner bodies are formed integrally. Figure 16 shows a large capacity burner device 250 of -annular form and including a bottom wall -25| which is adapted to be horizontally arranged and extends for substantially .180 degrees about the burner device as best shown in Figure 16v and then is inclined downwardly as indicated at 252 to' an inlet boss portion 253. The inlet aperture 255 of the inlet boss is substantially segmental in top plan and is adapted to be mounted upon mixing tubes of the types heretofore described, but

having the aligned outlet apertures of a form to iit the inlet aperture 254' of the'burner device.

As best indicated in Figure 18, a stream of gas 1 moving upwardly through the inlet aperture 254 will be divided t'o now upwardly above and along the inclined bottom wall portion 252 and thence entirely about the burner. As illustrated in Fig'- ure 17, the inlet portion of the burner device, that'is, the portion directly above the inlet 256, is of much greater cross section than the opposite portion of the burner above the i-lat lower wall 25|. This will, of course, insure that the flow of incoming gas will be in no way restricted and that a uniform supply oi gas will be furnished throughout the annular burners.

The outer wall 256 of the burner device is substantially vertical but slightly inwardly inclined and terminates in a rounded and upwardly in-V clined ledge 251 merging with an upper vertical wall 258 inclined inwardly from the vertical at an angle of approximately eleven and one-half degrees. The inner wall 260 is rounded outwardly as best shown at the left hand portion of Figure 17A and merges with a downwardly inclined top wall 26|. As best shown at the right hand portion of Figure 17, a vertically extending lower inner wall 262 is provided opposite the enlarged portion of the burner to connect with the downwardly inclined lower walls 252.

Jet ports 263/are provided in the upper outer wall portion 258, these ports being arranged substantially at right angles to that wall so as to be linclined slightly upwardly. v

In order that a highly eicient distribution of gas may be obtained throughout the entire circumference of the burner, a depending baiile or partition 265 extends about the burner above the inlet 250i and the inclined bottom walls 252. The baile projects downwardly from the top wall 26| substantially midway between the lower portion of the inner wall 260 and the lower outer wall portion 256. However, since the upper outer wall portion 258 is'spaced inwardly from the lower outerwall portion 256, a restricted -passage 266 will be provided between the outer face 'of the baffle wall 265 and the jet apertures 263.

The central portion of the baiile wall 265, that l is the portion above the inlet aperture 255, has

its lower edge horizontal but immediately at each edgeof the aperture the lower edge of wall 265 is inclined upwardly. as indicated in Figure 18 so that it extends substantially parallel with the nclined lower wall 252.

The provision of the baffle 265 insures that a `proper proportion of the incoming gas and 'air' will be excluded from the vjet ports 265 inthe ably arranged diametrically opposite the inlet 254. The side walls 21| of the recess are vertical and the inner wall is also substantially vertical but rounds inwardly as shown at 212 to a point substantially midway of the thickness of the annulus. The lower edge of the inner wall 26B may also be rounded as shown at 213 at itslower edge.

A slot 215 is cut through the lower wall of the burner as indicated in Figures 16 and 17 centrally of the lower portion of the recess 210. As a result of this, gas issuing through the slot 215 will be ignited from a simmer burner or the like andthe flame will thus extend upwardly along the inner wall 216 of the recess to ignite gas simultaneously issuing through the jet ports 263.

The provision of the rounded under edge 212 of recessV 216 insures that a iiame will readily travel outwardly to the recess 216. The lower wall 25| of the burner preferably projects upwardly into the burnerr chamber or passage adjacent the recess 216, the upper surface of the major portion of the lower wall 25| .being indicated in Figure 17 bythe numeral 216 while the upper wall of the recessed portion is indicated by the numeral 211. This formation both strengtht I ens the burner adjacent the slot 215` and also' wardly to form a top wall 26| a. Also the outer wall 21Go is rounded inwardly from its lower edge to a point immediately below the jet ports 26M, being curved upwardly immediately below these ports as indicated at 251e. V

In the Figure 19 burner the baille plate 255@ extends downwardly from the interior of the upper inclined portion 25M of the outer wall and immediately below the jet vports 263a `so that a chamber- 280 is formed beneath the inwardly curving outer wall 256e and the outer surface of the baliie 265a and through which gas may flow to the jet ports in the semi-circular portion of the burner distant from the inlet aperture 255m and above the horizontal portion 252a oli the bottom` wall of the burner. From Figure 21 it will be observed that the lower edge of the inclined portions of balile 265e .diverges slightly from the lower wall portion 252e, giving the desired proportioning of the inflow of gas in a burner of average capacity. Also, the central portionA of the baille is quite close to the inlet aperture 255m.

The igniting recess 216 of the Figure 19 burner has its inner wall 212:1. inclined at about the same angle of inclination to the vertical as the upper portion 258e of the outer wall of the burner. The burners described in Figures 16 to 21have the same advantages as to flame qualities, secondary air supply, and the protection of the jets from substances spilled upon the burner as have been set forth above in connection with the burn` ers illustrated in Figures 1 to 15.

It will be understood that all of. the burners described herein may be used with mixing tube of various types.

Subject matter disclosed but not claimed herein may be claimed in my above vmentioned divisional application, Serial No. 541,162, filed June 20, 1944, for Gas range structures.

The. terminology employed in the specification is for the purpose of description and not of limiby a bottom wall and inner and outer walls pro-` jecting upwardly therefrom, said outer wall being provided with a circumferential series f jet ports, a vertical slot through said bottom wall so that gas may ow therethrough from the gas chamber to atmosphere, a recess in said outer' wall extending from the slot to a pointsubstantially immediately below the jct ports, and means to ignite gas issuing from the slot so that a llame -will extend upwardly in the recess to ignite gas issuing from the jet ports.

2. A gas range burner of annular form including, in radial section, top, bottom and side walls, a side wall of Said burner being provided with a circumferential series of jet ports, a gas inlet port opening through the bottom wall of the burner, and a baille plate projecting downwardly from said top wall intermediate the width of said wall, said plate being longitudinally arcuate to extend partially about the circumference of the burner and having its loweredge disposed below the series of jet ports and facing the gas inlet port to divide the stream of inowing gas, said baille plate being of increasing depth from each end to an-intermediate portion and said intermediate portion of greatest depth being opposite the gas inlet port.

3. The structure defined in claim l wherein said gas igniting means comprises a simmer burner positioned below and centrally of said annular burner. d

4. A gas range burner of annular formincluding, in radial section, a bottom wall and upper walls so positioned with relation to said bottom l .wall as to denne with said bottom wall an enclosed annular gas passage, one of said upper walls being provided with a circumferential series of jet ports opening from the gas passage, a gas inlet port opening through said bottom wall, and a vertically disposed baffle plate projecting. downwardly fromone of said upper walls, said bale plate being longitudinally arcuate to extend partially about the circumference of the burner and having its lower` edge disposed below the series Y of jet ports and facing the gas inlet port to divide lper portion of said 'outer side wall being substantially vertical and having a series of jet ports circumferentially spaced about the same, a gas inlet port opening through the bottom'wall, and a vertically disposed baille plate extending downwardly from the upper portion of said outer side wall to be horizontally opposite the lower portion of saidouter side wall, said plate being longitudinally arcuate to extend partially about the circumference of the burner and having its lower edge disposed below the series of jet ports and facing the gas inlet port to divide the stream of vinflowing gas and being of increasing depth from each end thereof to an intermediate portion and said intermediate portion of greatest depth being opposite the gas inlet port.

BEST PRATT. 

